Green route synthesis of nanoporous copper oxide for efficient supercapacitor and capacitive deionization performances

Paskalis Sahaya Murphin Kumar, Htet Htet Kyaw, Myo Tay Zar Myint, Lamya Al-Haj, Ala'a H. Al-Muhtaseb*, Mohammed Al-Abri, Vembuli Thanigaivel, Vinoth Kumar Ponnusamy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


We demonstrate a simple template-free green method to prepare copper oxide (CuO) nanoporous material using copper acetate as a single precursor with Piper nigrum (Indian black pepper) dried fruit extract as a reducing medium under microwave irradiation. The surface properties and morphology of the obtained CuO material were assessed using powder X-ray diffractometer, X-ray photoelectron spectrometer, field-emission scanning electron microscope with elemental mapping analysis, focused ion beam high-resolution transmission electron microscope, and N2 adsorption-isotherm techniques. The characterization results reveal that the prepared CuO is a single monoclinic crystalline phase, and nanoporous in morphology with a specific surface area of 81.23 m2 g−1 and containing pore sizes between 3–8 nm. Nanoporous CuO showed excellent electrochemical energy storage performance with the specific capacitance of 238 Fg−1 at 5 mVs−1 when compared with commercially available CuO (75 Fg−1). Also, nanoporous CuO showed efficient desalting performance in the capacitive deionization system. This eco-friendly synthesis derived nanoporous CuO can be applied as high-performance supercapacitor material for high-energy storage devices and desalination processes.

Original languageEnglish
Pages (from-to)10682-10694
Number of pages13
JournalInternational Journal of Energy Research
Issue number13
Publication statusPublished - Oct 25 2020


  • desalination
  • high-performance supercapacitor
  • microwave-assisted synthesis
  • nanoporous copper oxide
  • plant-extract
  • template-free

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology


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